From: Tejun Heo <htejun@gmail.com>
Date: Tue, 11 Apr 2006 13:32:19 +0000 (+0900)
Subject: [PATCH] sata_sil24: put port into known state before softresetting
X-Git-Tag: firefly_0821_release~35456^2~109
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=2555d6c268240fb3f5f335bd62d0518025343c0f;p=firefly-linux-kernel-4.4.55.git

[PATCH] sata_sil24: put port into known state before softresetting

Make sure the controller has no pending commands and ready for command
before issuing SRST.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---

diff --git a/drivers/scsi/sata_sil24.c b/drivers/scsi/sata_sil24.c
index 8199527966eb..bfbd630a889c 100644
--- a/drivers/scsi/sata_sil24.c
+++ b/drivers/scsi/sata_sil24.c
@@ -474,6 +474,12 @@ static int sil24_softreset(struct ata_port *ap, unsigned int *class)
 	irq_enable = readl(port + PORT_IRQ_ENABLE_SET);
 	writel(irq_enable, port + PORT_IRQ_ENABLE_CLR);
 
+	/* put the port into known state */
+	if (sil24_init_port(ap)) {
+		reason ="port not ready";
+		goto err;
+	}
+
 	/*
 	 * XXX: Not sure whether the following sleep is needed or not.
 	 * The original driver had it.  So....